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<body>
<div class="iris_headline">IRIS Toolbox Reference Manual</div>




<h2 id="model/xsf">xsf</h2>
<div class="headline">Power spectrum and spectral density of model variables</div>

<h4 id="syntax">Syntax</h4>
<pre><code>[S,D,List] = xsf(M,Freq,...)
[S,D,List,Freq] = xsf(M,NFreq,...)</code></pre>
<h4 id="input-arguments">Input arguments</h4>
<ul>
<li><p><code>M</code> [ model ] - Model object.</p></li>
<li><p><code>Freq</code> [ numeric ] - Vector of frequencies at which the XSFs will be evaluated.</p></li>
<li><p><code>NFreq</code> [ numeric ] - Total number of requested frequencies; the frequencies will be evenly spread between 0 and <code>pi</code>.</p></li>
</ul>
<h4 id="output-arguments">Output arguments</h4>
<ul>
<li><p><code>S</code> [ namedmat | numeric ] - Power spectrum matrices.</p></li>
<li><p><code>D</code> [ namedmat | numeric ] - Spectral density matrices.</p></li>
<li><p><code>List</code> [ cellstr ] - List of variable in order of appearance in rows and columns of <code>S</code> and <code>D</code>.</p></li>
<li><p><code>Freq</code> [ numeric ] - Vector of frequencies at which the XSFs has been evaluated.</p></li>
</ul>
<h4 id="options">Options</h4>
<ul>
<li><p><code>'applyTo='</code> [ cellstr | char | <em><code>Inf</code></em> ] - List of variables to which the option <code>'filter='</code> will be applied; <code>Inf</code> means all variables.</p></li>
<li><p><code>'filter='</code> [ char | <em>empty</em> ] - Linear filter that is applied to variables specified by 'applyto'.</p></li>
<li><p><code>'nFreq='</code> [ numeric | <em><code>256</code></em> ] - Number of equally spaced frequencies over which the 'filter' is numerically integrated.</p></li>
<li><p><code>'matrixFmt='</code> [ <em><code>'namedmat'</code></em> | <code>'plain'</code> ] - Return matrices <code>S</code> and <code>D</code> as either <a href="../namedmat/Contents.html"><code>namedmat</code></a> objects (i.e. matrices with named rows and columns) or plain numeric arrays.</p></li>
<li><p><code>'progress='</code> [ <code>true</code> | <em><code>false</code></em> ] - Display progress bar on in the command window.</p></li>
<li><p><code>'select='</code> [ <em><code>@all</code></em> | char | cellstr ] - Return XSF for selected variables only; <code>@all</code> means all variables.</p></li>
</ul>
<h4 id="description">Description</h4>
<h4 id="example">Example</h4>

</body>
<div class="copyright">IRIS Toolbox. Copyright &copy; 2007-2014 Jaromir Benes.</div>
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